Malicious PDF — malware analysis report

Static analysis result for SHA-256 440221e5125bd2cd…

MALICIOUS

PDF

44.0 KB Created: 2020-09-18 07:24:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a9970fdc3baf1207ddc2bdf3ec1a178d SHA-1: 2582a0c019f4034d80f22567277b050d48f9c51d SHA-256: 440221e5125bd2cdbfad86185fa20bfc392f3cb11d176c68054515b3ad9575a5
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a mass external link farm, with one prominent link pointing to a known malicious redirector. The document body, though heavily obfuscated, contains the same lure text as the malicious URL, suggesting an attempt to trick users into clicking the link. The presence of numerous Shopify-hosted PDF links, while individually benign, serves to obscure the malicious redirector within a larger SEO-based link farm.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.club/wix?keyword=when+dinosaurs+roamed+america+dilophosaurus
    • http://bopoze.harpersferryboostersinc.org/uploads/1/3/2/6/132682694/9551848.pdf
    • http://xevadarek.alexspartalis.com/uploads/1/3/1/6/131606027/dapebitagojize.pdf
    • https://cdn.shopify.com/s/files/1/0433/9017/3349/files/brunnen_bohren_das_handbuch.pdf
    • https://cdn.shopify.com/s/files/1/0431/8973/1479/files/86819465149.pdf
    • https://cdn.shopify.com/s/files/1/0429/7120/1699/files/12317357924.pdf
    • https://cdn.shopify.com/s/files/1/0430/2392/5402/files/capillary_electrophoresis_agilent.pdf
    • https://cdn.shopify.com/s/files/1/0438/4319/0944/files/fit_body_boot_camp_workouts.pdf
    • https://cdn.shopify.com/s/files/1/0429/2693/2124/files/febujezokekor.pdf
    • https://cdn.shopify.com/s/files/1/0482/2636/9690/files/gedavi.pdf
    • https://cdn.shopify.com/s/files/1/0432/7152/0409/files/fegobulise.pdf
    • https://cdn.shopify.com/s/files/1/0433/4790/2623/files/kiwesigevajepaw.pdf
    • https://ffb7e306-cb62-4651-a28d-230ee21dfb9b.filesusr.com/ugd/1cc777_c2b0e2784fc046d6b3c5bfe7b707729c.pdf?index=true
    • https://de484941-6a0b-4310-a196-3191048cfddd.filesusr.com/ugd/158fb9_ed75275aa1ae4ba7a0b939c129a03bf8.pdf?index=true
    • https://6adef614-4bd5-479e-afc3-651edcbd52dc.filesusr.com/ugd/fe83c3_35e0cd6ee5684bdea94e3d316fdbb418.pdf?index=true
    • https://7b33439e-7bf8-4702-bc96-e24a08751545.filesusr.com/ugd/c0fca2_c00f17b18a194ee580256abedca62845.pdf?index=true
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006d3c.bin
e8c999786d54271f745b672cf593cddbf910bea077c17e5ed36aaaeabb6fa3df
pdf-font-stream PDF embedded font (sfnt) at offset 0x6D3C 5324 bytes
font_01_sfnt_off00007f3a.bin
15c9967c3ced9d8c28b153f927ebd0f6cd81a771078a9b2e218b042a9189f5d3
pdf-font-stream PDF embedded font (sfnt) at offset 0x7F3A 10616 bytes